package socket.udp.multicast;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.MulticastSocket;

/**
 * @author 周宇
 * @create 2020-05-25 17:17
 * UDP 接收数据
 */
public class ReceiveServer {
    public static void main(String[] args) throws IOException {
        MulticastSocket ms = new MulticastSocket(10000);

        DatagramPacket dp = new DatagramPacket(new byte[1024], 1024);

        //把当前计算机绑定一个组播地址，表示添加到这一组
        ms.joinGroup(InetAddress.getByName("224.0.1.0"));

        ms.receive(dp);

        byte[] data = dp.getData();
        int length = dp.getLength();
        System.out.println(new String(data, 0, length));

        ms.close();
    }
}